EP 2486583 A1 20120815 - APPARATUS FOR MEASURING RF VOLTAGE FROM A QUADRUPOLE IN A MASS SPECTROMETER
Title (en)
APPARATUS FOR MEASURING RF VOLTAGE FROM A QUADRUPOLE IN A MASS SPECTROMETER
Title (de)
VORRICHTUNG ZUR MESSUNG DER VON EINEM QUADRUPEL IN EINEM MASSENSPEKTROMETER AUSGEHENDEN HF-SPANNUNG
Title (fr)
APPAREIL DE MESURE DE TENSION RF D'UN QUADRIPÔLE DANS UN SPECTROMÈTRE DE MASSE
Publication
Application
Priority
- US 25014209 P 20091009
- CA 2010001605 W 20101007
Abstract (en)
[origin: US2011084690A1] An apparatus for measuring RF voltage from a quadrupole in a mass spectrometer are provided. The apparatus comprises at least one rectifying diode circuit for rectifying the RF voltage of the quadrupole to produce a rectified RF voltage. The apparatus further comprises at least one operational amplifier configured as a current to voltage converter, a negative input of the at least one operational amplifier connected to the output of at least one diode in the at least one rectifying diode circuit, a positive input of the at least one operational amplifier at ground, and an output of the at least one operational amplifier in a feedback look with the negative input, to reduce reverse leakage current from the at least one diode.
IPC 8 full level
H01J 49/42 (2006.01)
CPC (source: EP US)
G01R 19/003 (2013.01 - EP US); G01R 19/0084 (2013.01 - EP US); H01J 49/022 (2013.01 - EP US); G01R 21/10 (2013.01 - EP US); G01R 33/32 (2013.01 - US); G01R 33/36 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 2011084690 A1 20110414; US 9714960 B2 20170725; CA 2788225 A1 20110414; CA 2788225 C 20180116; EP 2486583 A1 20120815; EP 2486583 A4 20170607; JP 2013507725 A 20130304; JP 5831944 B2 20151209; WO 2011041902 A1 20110414
DOCDB simple family (application)
US 89967210 A 20101007; CA 2010001605 W 20101007; CA 2788225 A 20101007; EP 10821527 A 20101007; JP 2012532430 A 20101007